Half to ralph bagaley



(No Model.)

W. A. BOLE.

TUBE EXPANDBR.

Ql l

PATENT FFCE@ WILLIAM A. BoLn, on rrrrsunc, PENNSYLVANIA, AssIcNoR or oNn- HALF To RALPH BAGALEY, or sAME rLAcE.

TUBE-.EXPANDER.

SPECIFICATION forming part of Letters Patent No. 319,879, dated June '9, 1885 Application lcdFebruary 4, 1885.

4, transverse sections through the same at the.

lines x zr, g/ y, and .c z, respectively, of Fig. l; Fig. 5, a longitudinal section, on an enlarged scale, at the center of one of the expandingrollers,.and Fig.v 6 a side view in elevation of the feed-nut.

The object of my invention is to provide an effective and desirable apparatus by the employment of which the expansion' of the end portions of metal tubes or. pipes into sockets or openings designed to receive the same may be effected by the application of power ad- 2 5 jacent and exterior to either end of the tube,

as desired; and my improvements consist in certain novel devices and combinations hereinafter fully set forth.

In an application for Letters Patent filed by me January 17,V 1885, Serial No. 153,132, I have set forth a pipe-coupling in which external end threads on two .pipe-sections are screwed into engagement lwith the internal thread of VAa coupling-socket, and thereafter forced into close contact therewith by being expanded thereinto by the application of internal pressure. p

My present invention is particularly designed for use in the formation of couplings of such character, but is lik wise advantageously applicable in the expa sion of plainsurfaced tubes under such conditions as prevent the operation of an expander from being effected at or adjacent to the end of the tube i which is to be acted upon,`and where, consequently, the transmission of the expanding force throughout the length of the tube becomes necessary.

' In the practice of my invention I providea substantial tubular mandrel, 5, having a coni- (No model.)

with that of the expander-head, is fitted freely.

thereon,.its bore being sufficiently large to enable the headto enter therein to or nearlyv 6o to its greatest diameter. A series of expand- ,ing-rollers, 9,. in the form of frusta of cones,.

fis journaled longitudinally in recesses in the periphery of the carrier 8, said rollers being tapered correspondingly with the expander- ;head, and being in contact therewith. The ,end journals of the rollers rest in radiallyslotted bearings in the carrier, and are prevented from being displaced therefrom by 'light straps or caps 10, bolted to the periphery of the carrier and covering the outer ends of the slots. Movement ofthe mandrel 5and its expander-head relatively to thecarrier and iu. the direction of the smaller diameterof the bore of the latter will consequently press the rollers outwardly in the carrier and force them against the bore of a tube in which the carrier maybe inserted. f The Adrivingmechanism by which rotation aand longitudinal movement are coincidently imparted to the mandrel 5 is mounted in a :supporting-frame, 11, journaled by end bear-` ings, 12, on the mandrel, and having a bear-y ing, 13, located between and perpendicularly to the end bearings forthe reception of a driving-shaft, 14, to which rotation may be imparted either directly through a crank or handwheel or by suitable gearing. A feed-nut, 16, @having an internal thread, 17, for a portion of its length, engaging an external thread, 18, on vthe bearing 12 farthest from the expander- 1head, is mounted on the mandrel 5, said nut `fitting the mandrel with sufcient freedom to permit longitudinal movement of the same, except when held thereto, by frictional contact. l Such connection is effected, when required, by means of Aclamping-bolts 19, Vexerting draft upon the outery end of the nut, which is rendered compressible upon the mandrel by b'eing split or divided by radial slots 20, extending from its` bore to its periphery, adjacent to IOO its outer end. A bevel-gear, 21, secured upon the drivingshaft 14, meshes with a similar gear, 22, which fits loosely on the mandrel 5, and engages the keyways 7 thereof-by keys or splines 23.` End movement of the gear 22 is prevented bythe bearing 12, against which it abuts, and by a sleeve, 24, interposed between its opposite end and the opposite bearing, 12, and through its splines 23 it imparts rotation to the mandrel without partaki'ng of the end movement thereof. The mandrel is moved longitudinally in the direction-ofdriving-shaft, and the expander-head is therethe roller-carrier 8, coincidently with its rotat-ion, by the engagement of the feednut 16 with the thread of the outer'bearing 12, the feed-nut being rotated by the mandrel whenl clamped thereto by the bolts 19, as before d'escribed. 'Ihe supporting-frame 11 is adj usted in such position upon the mandrel as may be required by the length of the tube through which the mandrel is to operate, such position being regulated by an adjustable collar, 25, held to the mandrel by aset-screw, 26, or otherwise arranged so as to be readily adjusted A graduated l a tubular mandrel having a conical or taperand fixed in desired position. scale or index-plate, 27, on the mandrel,which, for exemplication, is shown in Fig. 1 as if marked upon one of the keyways 5, although in fact located upon the periphery of the mandrel adjacent thereto, enables the position of the frame for known lengths of pipe to be accurately determined in each instance without the necessity of measurement. The mandrel is guided and supported centrally in the tube removable supporting-socket adapted to fitV 1, which is to be expanded by one or more series of centeringrollers,which are j ournaled on the periphery of a sleeve or sleeves, 29, fitting around the mandrel, and are adapted to bear uniformly against the inner surface of the tube. The construction is in this instance shown as adapted to the expansion of the threaded ends of tubes 1 2, within internally-threaded coupling-sockets 4, and said sockets are utilized as abutments for the connection of the supporting-frame 11 to the tubes in the operation of the expander. To this end a sleeve, 30, having an external thread suited to engage the threads .of the coupling-sockets, is ttted, upon the est the expander-head, and is held thereon by a collar, 32. The sleeve 30 is screwed into andout of engagement with the socket by a upon are unprovided with coupling-sockets,a

around their ends may be employed.

In order to enable the roller-.carrier 8 to be adjusted in proper longitudinal position on the expander-head 5, a carrier-spindle, 33, which, to reduce Weigh`t,may be made tubular, asshown, is connected by'a strap or stirrup, 34, to ythe outer end'of'the carrier -8. The spindle 33 passes through' the central opening of the mandrel 5, so as to be' actuated by the operator from the vopposite end thereof. `A circumferential flange or projection, 35, on the smaller-.end of the expander-head 6, abuts against the adjacent end of the roller-carrier in the withdrawal of the mandrel from the tube, and thereby eifects the coincident Withdrawal of the carrier and spindle.

In operation the mandrel is inserted into the, tube for such distance as to enable the roller-carriers to rest Within the portion at the farther end, which is to be expanded. The supporting-frame being connected to the opposite end ofthe tube and the feed-nut clamped to the mandrel, rotation is imparted to the by simultaneously rotated andmoved longitudinally through the roller-carrier, forcing outward and rotating the expanding-rollers,

which, by their pressure uponthe tube, eect the expansion required. By a reversal of the movement of the driving-shaft the mandrel Vis retracted,and the rollers being then loos-Y ened from their bearing on the tube,the rollercarrier is withdrawn,with the mandrel,there from.

I claim herein as my invention- 1. The combination, in a tube-expander,of

ing expander-head at one of its ends, a carrier flttedwith a series of expander-rollers vand mounted upon the expander-head with thecapacity of end movement of the latter relatively to the carrier, and a spindle connected to the carrier and passing through the bore of the mandrel to the opposite end there- `of, substantially as set forth.

2. The combination, in a tube-expander, of

a. mandrel having a conical or tapering expander-head at one of its ends, a carrier fitted With a series of expander-rollers and mounted upon the expander-head 4'with the capacity of end movement of the latter relatively to the with ythe gear of the driving-shaft, substanjtially as set forth. bearing 12 of the supporting-frame 11 nearf a mandrel having a conical or tapering expander-head, a carrier fitted with a series of lexpander-rollers and mounted upon the ex- Wrench or bar, fitting recesses 31, in its periphery, andwhere the tubes which are acted 3. The combination, in a tube-expander, of

pander-head with the capacity of end movement of the latter` relatively to the carrier,

`driving-gearing for imparting rotation to the `mandrel, and a compressible feed-nut fitting around the mandrel and engaging a thread on a fixed support, substantially as set forth.

upon the expander-head with the capacity of `end movement of the latter relatively to the carrier, a carrier-spindle connected by a strap nally through the mandrel, driving-gearing IOO , or stirru'p to the carrier and passing longitudifor rotating the mandrel, and a Series of `eentering-rollers journaled in a sleeve inclosing the mandrel between the expander-head and driving-gearing, substantially as set forth.

5. The combination, in a tube-expander, of aa mandrel having a conical or tapering eX- pander-head at one of its ends, a carrier itted with a series of expander-rollers and mounted upon the expander-head with the capacity of end movement of the latter relatively to the carrier, a driving-gear supporting-frame journaled on the mandrel, a stop-collar fitting adjustably upon the mandrel and serving as an end abutment for the supporting-frame, and an adjusting-scale or index-plate fixed upon the mandrel, substantially as set forth.

6. The combination, in a tube-expander, of

.' a mandrel having a conical or tapered expander-head at one of its ends, a carrier fitted with a series of expander-rollers and mounted upon the expander-head with the capacity of end movement of the latter relatively to the oarrier, a driving-gear supporting-frame journaled upon the mandrel, gearing for rotating the mandrel from a shaft in said frame, and a threaded sleeve itting on ythe supportingframe eoneentrically with the mandrel, and adapted to engage an internally threaded socket connected to a pipe which is to be expanded, substantially as set forth.

In testimony whereof I have hereunto set my hand.

WILLIAM A. BOLE. Witnesses:

J. lSNOWDEN BELL, l R. H. WHIrTLEsEY. 

